I gave my old 12" sub to a friend when I upgraded my car stereoits a alpine vr 12 thats about 10+ years old. in my car it lived in a ported bass tubebought years ago, and it sounded ok to me - but distorted a little at volume

I showed my buddy this site - and he decided he wanted to put the 12" in a db-12just to see how it did ( he liked my db10 )

box was built to specs - slider piece was amazingly hard to move up and down in the box.12" sub was put in and wired up to his amp320w rms ( 100rms 200wmax labeled sub ) gain turned way down

testing out the new box design in his 2003ish ford explorerbox port facing the rear hatch - box all the way up against the rear seat

it sounds simply amazing.its loud - clear - and loud - and it shakes the seats in his truck.when you get in and crank up the tunes - you would swear there is 3 big subs back theremaking all that sound.its realley awesome.